Why data sources query existing infrastructure in Terraform - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to query an existing AWS VPC using a data source.

Terraform

data "aws_vpc" "example" {
  id = [1]
}

Drag options to blanks, or click blank then click option'

A"subnet-12345678"

B"my-vpc"

C"vpc-12345678"

D"instance-12345678"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a subnet or instance ID instead of a VPC ID.

Using the VPC name instead of the ID.

The id attribute must be the VPC ID, like "vpc-12345678", to query the existing VPC.

2fill in blank

medium

Complete the code to get the CIDR block of an existing AWS VPC using a data source.

Terraform

output "vpc_cidr" {
  value = data.aws_vpc.example.[1]
}

Drag options to blanks, or click blank then click option'

Acidr_block

Binstance_type

Csubnet_ids

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'id' instead of 'cidr_block'.

Using unrelated attributes like 'instance_type'.

The cidr_block attribute gives the IP range of the VPC.

3fill in blank

hard

Fix the error in the data source block to correctly query an existing AWS subnet by its ID.

Terraform

data "aws_subnet" "example" {
  [1] = "subnet-87654321"
}

Drag options to blanks, or click blank then click option'

Aid

Bvpc_id

Ccidr_block

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'name' instead of 'id'.

Using 'vpc_id' which is not the subnet's ID.

The correct attribute to specify the subnet ID is id.

4fill in blank

hard

Fill both blanks to query an existing AWS security group by its name and output its ID.

Terraform

data "aws_security_group" "example" {
  [1] = "my-security-group"
}

output "sg_id" {
  value = data.aws_security_group.example.[2]
}

Drag options to blanks, or click blank then click option'

Aname

Bid

Cdescription

Dvpc_id

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'description' or 'vpc_id' instead of 'name' or 'id'.

Mixing up the attributes for querying and output.

Use name to find the security group by name, and id to output its unique identifier.

5fill in blank

hard

Fill all three blanks to query an existing AWS EC2 instance by its ID, get its subnet ID, and output the subnet ID.

Terraform

data "aws_instance" "example" {
  [1] = "i-0abcdef1234567890"
}

output "instance_subnet" {
  value = data.aws_instance.example.[2]
}

resource "aws_security_group_rule" "allow_http" {
  type              = "ingress"
  from_port         = 80
  to_port           = 80
  protocol          = "tcp"
  security_group_id = data.aws_instance.example.[3][0]
  cidr_blocks       = ["0.0.0.0/0"]
}

Drag options to blanks, or click blank then click option'

Aid

Bsubnet_id

Cvpc_security_group_ids

Dinstance_type

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'instance_type' instead of 'id' for querying.

Using 'id' instead of 'subnet_id' for subnet output.

Using 'id' instead of 'vpc_security_group_ids' for security group IDs.

Use id to query the instance, subnet_id to get its subnet, and vpc_security_group_ids to get the security group IDs for the rule.